COMPOSITIONS FOR USE IN IDENTIFICATION OF STRAINS OF E. COLI O157:H7
First Claim
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1. A composition, comprising at least one purified oligonucleotide primer pair that comprises forward and reverse primers about 15 to 35 nucleobases in length, wherein said forward primer comprises at least 70% identity with a sequence selected from SEQ ID NOs:
- 1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
11-20.
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Abstract
The present invention relates generally to strain typing of Escherichia coli O157:H7, and provides methods, compositions and kits useful for this purpose when combined, for example, with molecular mass or base composition analysis.
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Citations
38 Claims
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1. A composition, comprising at least one purified oligonucleotide primer pair that comprises forward and reverse primers about 15 to 35 nucleobases in length, wherein said forward primer comprises at least 70% identity with a sequence selected from SEQ ID NOs:
- 1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
11-20. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- 1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
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13. A kit, comprising at least one purified oligonucleotide primer pair that comprises forward and reverse primers about 15 to 35 nucleobases in length, wherein said forward primer comprises at least 70% identity with a sequence selected from SEQ ID NOs:
- 1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
11-20.
- 1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
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14. A method of determining a presence of E. coli O157:
- H7 in at least one sample, the method comprising;
(a) amplifying one or more segments of at least one nucleic acid from said sample using at least one purified oligonucleotide primer pair that comprises forward and reverse primers that are about 20 to 35 nucleobases in length, and wherein said forward primer comprises at least 70% sequence identity with a sequence selected from the group consisting of SEQ ID NOs;
1-10, and said reverse primer comprises at least 70% sequence identity with a sequence selected from the group consisting of SEQ ID NOs;
11-20 to produce at least one amplification product; and(b) detecting said amplification product, thereby determining said presence of said E. coli O157;
H7 in said sample. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- H7 in at least one sample, the method comprising;
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21. A method of identifying one or more strains of E. coli O157:
- H7 in a sample, the method comprising;
(a) amplifying two or more segments of a nucleic acid from said one or more strains of E. coli O157;
H7 in said sample with two or more oligonucleotide primer pairs to obtain two or more amplification products;(b) determining two or more molecular masses and/or base compositions of said two or more amplification products; and (c) comparing said two or more molecular masses and/or said base compositions of said two or more amplification products with known molecular masses and/or known base compositions of amplification products of known strains of E. coli O157;
H7 produced with said two or more primer pairs to identify said one or more strains of E. coli O157;
H7 in said sample. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- H7 in a sample, the method comprising;
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34. A system, comprising:
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(a) a mass spectrometer configured to detect one or more molecular masses of amplicons produced using at least one purified oligonucleotide primer pair that comprises forward and reverse primers about 15 to 35 nucleobases in length, wherein said forward primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
1-10, and wherein said reverse primer comprises at least 70% identity with a sequence selected from SEQ ID NOs;
11-20; and(b) a controller operably connected to said mass spectrometer, said controller configured to correlate said molecular masses of said amplicons with one or more strains of E. coli O157;
H7 identities. - View Dependent Claims (35, 36, 37)
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38. A composition comprising at least one purified oligonucleotide primer 15 to 35 nucleobases in length, wherein said oligonucleotide primer comprises at least 70% identity with a sequence selected from SEQ ID NOs:
- 1-20.
Specification